Canon EOS 10D - Manual (Page 49)

49
Settings f
or Shooting
3
Setting the ISO Speed
The ISO speed is a numeric indication of the sensitivity to light (
→p.158). A higher ISO speed
number indicates a higher sensitivity to light. Therefore, a high ISO speed is suited for moving
subjects or shooting in low-light conditions. However, the image will contain more noise to
make it look coarse or grainy. On the other hand, a low ISO speed will make the image look
finer, but it is not suited for freezing motion or shooting in low light.
ISO Speed in the Basic Zone Modes
ISO Speed in the Creative Zone Modes
You can set the ISO speed to “ ”, “ ”, “ ”, “ ”, or “ ”. If the menu’s [ISO expan-
sion] is set to [On], you can also set “ ” (ISO 3200).
Press the < > button. ( )
s The current ISO speed will be displayed on the LCD
panel.
•
In the Basic Zone modes, “ ” will be displayed
on the LCD panel.
1
Set the ISO speed.
•
While looking at the LCD panel, turn the < > dial
to set the desired ISO speed.
•
To return to shooting, press the shutter button
halfway.
2
In step 2 , turning the < > dial will set the drive mode. (
→p.76)
The ISO speed is set automatically. (ISO)
Normal (No flash) Varies* 100 Varies* Varies* 400 Varies* Varies*
With built-in flash 400** 100 – 400** – 400** –
With external Speedlite 100 100 100 100 400 100 –
* Automatically set within ISO 100-400. ** For daytime backlit conditions, ISO 100 is set.
•
The higher the ISO speed and the higher the ambient temperature, the more noise
the image will contain and the larger the image file size will be. Therefore, fewer
images can be recorded on the CF card. On the LCD panel, you can check how many
more images the CF card can hold. (
→p.16)
•
High temperatures, high ISO speeds, or long exposures may cause irregular colors in
the image.